`facility` keyword not highlighted

[smortex]

The FreeBSD sample configuration file mimics the default syslog configuration and has a few filters where the syntax highlighting does not highlight the facility keyword, e.g.

In the above snippet, facility has the default color, but we could expect it to be colored like other keywords such as level.

Snippet to reproduce the issue:

filter f_auth { facility(auth); };

[alltilla]

This is a limitation of https://github.com/alltilla/syslog-ng-cfg-helper => alltilla/axosyslog-cfg-helper#6

The parsing of the filter sentences is different from all the other drivers, and I have not implemented it yet. I will work on it.